Traffic isn't just bad for our moods — it's also hurting the planet. Reporter Daniel Gross delves into the underlying engineering behind traffic jams, and how cleaning them up will also reduce emissions.

In New York City, sharing a cab with a stranger is about as popular as eating pizza with a knife and fork. Yet a new study by MIT researchers says shared rides could cost half as much, take just a few minutes longer on average and dramatically slow traffic and pollution. But would New Yorkers do it?

Mexico built tens of thousands of suburban houses to support a home-owning boom, with the hope that cities would expand around these communities. But it's not working out that way. Now the country has 600,000 abandoned homes.

Mexico built tens of thousands of suburban houses to support a home-owning boom, with the hope that cities would expand around these communities. But it's not working out that way. Now the country has 600,000 abandoned homes.

In New York City, sharing a cab with a stranger is about as popular as eating pizza with a knife and fork. Yet a new study by MIT researchers says shared rides could cost half as much, take just a few minutes longer on average and dramatically slow traffic and pollution. But would New Yorkers do it?

Traffic isn't just bad for our moods — it's also hurting the planet. Reporter Daniel Gross delves into the underlying engineering behind traffic jams, and how cleaning them up will also reduce emissions.

Mexico built tens of thousands of suburban houses to support a home-owning boom, with the hope that cities would expand around these communities. But it's not working out that way. Now the country has 600,000 abandoned homes.

Traffic isn't just bad for our moods — it's also hurting the planet. Reporter Daniel Gross delves into the underlying engineering behind traffic jams, and how cleaning them up will also reduce emissions.

In New York City, sharing a cab with a stranger is about as popular as eating pizza with a knife and fork. Yet a new study by MIT researchers says shared rides could cost half as much, take just a few minutes longer on average and dramatically slow traffic and pollution. But would New Yorkers do it?

Mexico built tens of thousands of suburban houses to support a home-owning boom, with the hope that cities would expand around these communities. But it's not working out that way. Now the country has 600,000 abandoned homes.

In New York City, sharing a cab with a stranger is about as popular as eating pizza with a knife and fork. Yet a new study by MIT researchers says shared rides could cost half as much, take just a few minutes longer on average and dramatically slow traffic and pollution. But would New Yorkers do it?

Traffic isn't just bad for our moods — it's also hurting the planet. Reporter Daniel Gross delves into the underlying engineering behind traffic jams, and how cleaning them up will also reduce emissions.